Elsevier

Carbohydrate Research

Volume 197, 25 March 1990, Pages 338-344
Carbohydrate Research

Note
Structural characterisation of the exocellular polysaccharide from Cyanospira capsulata

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  • Cited by (22)

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    • Exopolysaccharides of Synechocystis aquatilis are sulfated arabinofucans containing N-acetyl-fucosamine

      2014, Carbohydrate Polymers
      Citation Excerpt :

      The presence of these acidic amino acids in EPS from S. pevalekii as well as the high degree of sulfation in EPS from S. aquatilis were proven by IR-spectroscopy and conductometric titration. A high negative charge of excreted cyanobacterial proteins had also been reported for other strains and seems to be characteristic for organisms from alcaline or high-salt habitats (Flaibani et al., 1989; Grant & Tindall, 1986; Marra et al., 1990; Nakagawa et al., 1987; Reed, 1986; Schrader et al., 1982). By no method (e.g. IEC, SEC, specific precipitation) it was possible to separate the charged protein fraction from the neutral carbohydrate moiety of EPS from S. pevalekii.

    • Structural investigation of an exopolysaccharide substituted with a lactyl ether group produced by Raoultella terrigena Ez-555-6 isolated in the Chernobyl exclusion zone

      2010, Carbohydrate Research
      Citation Excerpt :

      We noted that in the 1D 1H and the 13C NMR spectra (Fig. 3B and Table 2) there were three anomeric signals: two signals for the reducing glucuronic acid residue at δ 5.25 (α: 3J1,2 3.54 Hz), 100.7 and δ 4.63 (β: 3J1,2 7.96 Hz) and only one signal for the mannose residue at δ 5.15 (α: 3J1,2 1.95 Hz) δ 94.1. The α anomeric configuration for the mannose residue20–22 was confirmed by measurement of 1H/1C coupling constant in the 13C NMR spectrum realized without decoupling: 176.5 Hz. The carbon resonance observed at δ 176.6 was attributed to the CO group of glucuronic acid.

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